That’s a pretty rotten CPA deal. Part of the value of the CPA model is transferring the risk of winning players back to the casino. Here you’ve traded away a lifetime of commissions for a flat $50, but you still have the risk of not being paid if a player wins. And of course, $50 is an abysmally low amount for CPA in the first place.
I’d run the other way.
One more thing, a pet peeve of mine: Players don’t ‘loose’, they ‘lose’. Loose rhymes with goose.